Available copy



J. .WATSUN.

RECON. CHECK.

wuss/awn man JULY 29. lQlG.

Patented July 1, 1919.

INVENTOR Z0517 Win/2 6,071

mgmsa.

ATTORNEYS WITNE$$ UNiiiil si ns PATENT OFFICE.

w, maroon, or WAYNE, snvam oncom-onnok.

1-308, 130. fiosoifloation of Letters Patent. Patented J 11?]! 1,: 1919.1593mm filed m so, 191:. 542115180. 111,865.

To all whom it may coooem Bo it known that I JOHN Wilson, a citizen ofthe Ufiitfi Iii-miss mid a, resident of Wayne, county oi: Dola'woro, andState of Pennsylvania, have invontoai certain ow and useful Impoovomonfsin Roi: of which the following is a, sgiociiioziiiom goforenoo being badto the accompanying drawing My invention more especially relates torecoil or inbound oheofl for automohiles; and other vehicles in which itis iiosiz ziifia .zo eontrol and modify the recoil or roizmomi oi asoilby tho action of the springs in o 512mg is aostmio their normal posiiiiofisfloo tion, 'alth 4 if liliiifid; my on: men be employoz; in'ao'zmociion E; oihor me himism for the par or 2 suboiahiiilly free reiaii'oe w l. bodieo in ooodirootion ancl of mt -omit 3 relativemovomi'em'. m the ooposzio and as a ioaimo thoroof, moioo aiatomatioailyoompensati ports of the moooommi, tam friction IHfiEPiRETS a 7- 9fflaillffi of the invention may bowpliml to any construction whorefrioii 1 between movable members is appliol and 5 parts are soamooiaiswl thatwon o'iii Fasrow tho mochanism out. of afifiostzzoosi vtion comprohoniio bijoadly on" means for mmponsaiiug for woo nism ofsuch a character and iii; of the invention is not iiii'oito Chocks but'hasswwide rangoof oi? in connection with various mechanisms.

An object. of my invention io pro'vio means for retar iiog tho roloi'ivomovomont of two bodies in one direction whiio pormitting theirunretariied movemoiit in the onpo. siie direction and which, whena-pplieil to an automobile or other vehioio, will preferabvlyservo tocheck the recoil or npthi'ow .of the vohiirlo springs withoutinterfering with their comprosoion thus modifying and checking thenpthrow of tho spring-sup,-

l portal portions of the vehiolo, and theroby similor view showingoortaiin parts of the i voniion in a difiereni position than as ohown inFig. l. In Figs. 3, 4 and 5 I imxm illustrated a slightly modified formof the invention, Fig. 3 being a fragmentary side olemiion with thomz'ious parts in the same relative positioo as shown in Fig. 1, anal 4:ml 5 being fragmentary seciions when rosooobivoly on lines 4-4 and 5-45in Fig 3* Briefly, my invention comprises relatively movable members andmeans operative to permit the substaoizialiy froo relative movemontofsaid momirors in one. direction and to resist the movomonb of saidmembers in the otbor directiozi and for this purpose I may. omggioy omrsuitable means and 1mm rsieriimiiiiofl or M w poi-form the functions d 1tion of a which or the like by bolts 3,

oiiid drum being; I e forabiy embraced by a mi? of $12363 5 n mobsubstontiall semi c-irouior iii ooniom aoi provided with outwai iiyoxiond'ing flanges 7, 8. Each shoe may reforabiy bo lined with suitablefrictiona; material 9 secured in position by rivets 10, the show boifighinged together atone end upon a suitable transversely extending oin 12which passes through suitable apertures in the shoe flanges.

For th Purpose of allowin substantial freedom of imminent, when theparts are relatively rotated in one direction, between the drum and theshoes which latter as hereinafter described may be connected with the.

axle; of the vehicle, and to causo the shoos to grip the drum and thusbend to retard the relative movement of the parts when rotated in theother dimoi-ion, I may employ an suitable means, thogo shown in Figs. 1an 2 comprising an arm 15 curved adjacent one end in substantialconformity with the extotimz to {mgth in tha vm'iiiiral phmu j tantmliyat its water means 05 a smtabla transver punt pm 17 passmg through theshoe and thsough the arm. hi the: urn} hereinafter called thv w w issmith 1y mmahly connected by a member 18 with the axle 20 or otherporticn of the vehicle relatively movable with ruspwt Im the frame 2 andupon whivh the: irzmm is supported by means of the which 1 15 'm the,Well known manner. The PM? 0f the arm adjacent tho pivnt 1.. uviih dwith a PUPVQd transvewr i Slut prcfvmbiy fined wih 11 squad--deadeningand was! .13, through which the pin whereby the nmement sf the arm 7 1'?is limited thx'mzgh engagemc m hi *w 12 with the ands of the slot.

For the IHITFLFR of permitting r izstve freedom 0T" mm mam; between thedrum and the show in mu: dhe ion only, :15 TEX)! mample, Mam! H11 fm andaxle 111m? each vtim: and m {'HHSLE the lined 51h: 5% p H? drum in mtm'dsuch move "than is reversed, a5 far exampb? a and; axle rahztivelseparate. provide smi v'n mnved in one ah, mm :m-il inopc-i'altiva 1360:42, H19, drum when they with direction, and in mun shown in Figs. 1

farce the a v :nn many in in: the form (if ih m and 2 0h mwn :mycomprise a spring 39 miied 1112 1 871 having: an integral hand 3; 1image a lip 3 L integral with 21,1; cxtvnding frwary t'm'o zg n ha e 35in the lip and one (and of the ihh pring in in an intern-any ihrcmlnml'iy threaded pin a zu'rza 15 wfljawntits 'nvn pivot 11' and smimhletransvvrseiv pm 39 passing through s Forwardly extending Forthupurpnshis \J'H'WS in (on coil spring 42 in ihcrwm.

H1811 with HIP min; r

equmhmt @tvmesmy suitably thspusad is in a rowss hn-m ui boss 43 111 mm15 with the 1% 11 MR? 1 and. nut mm] 1 mm are PM? 1' 1 m in mow the fsw:

W mu

m: um? ahnas JL 1' M fatigue in the spring,

er the parts if becomes free to press on lip 3i and force the shoespowerfully together a ainst the drum so that at force is re uirod at thefree end of arm 5 to rotate the s on; about the drum inthe directionshown by the arrow in Fig. 2, whereby the relative movement of ecparation between the frame and axle is retardcd to any desired degree,depending on stren h of spring 30, and the vehicle sprinfis bro-1 1g tto rest in their normal position wit out violent u throw of the springsupported portions of t e vehicle.

' When the invention is first applied to a vehicle, the tension of sring may be adjusted by means of the ock nuts 36 to exert justment neednever be changed after having been oncemade, except to compensetegi'zorthe wear of linings 9 being readily compensated 'for in this form of theinvention by loosening lock nut positioned on the end of pin 37extending beyond bushing 31. and. screwing the bushing upwardly uilon rthe pin so that the parts at all times will be kept in such relativeposition that head 32 will seat on lip 3 when the upper end of slot 25is nearly in contact with pin 12. yAs stated above, my inventionincludes means to automatically compensate for wear between the frictionmembers in order in? avoid the necessity of manual adjustme so desired.Infect; I hove "provided an automatic weer compensating suitable form 0means which is A adopted for use with any kind of friction mechanismwherein reletivc weer between the members is liable to throw the partsout of proper ad'ustment,

and obviously this feature of the invention is not limited in its use toa recoil check such as shown in the drawings but has a wider range ofutility in connection with any sort of friction mechanism. 1' haveprovided means entirely automatic in its operation for positively takingup wear between the friction members immediately as the same occurs sothat the element of any friction device to which the compensating meansis rip lied will be always maintained in accuracmdjustment withoutrequiring any attention on the part of the operator. One

wear compensating means adapted for such uses, is illustrated in Figs.

tend 5 of the drawings.

of the invention, spring 36' Sl IITiUHlIHKPHI iif'iimd is positionedtheiteon by lock 'nuts iififi' theuip per end of the sprin contactingwith the l1p" 34 on shoe 5. in 37' may lm 'provided with an integralflange adapted to contact with the upperisurface of the lip and with asuitable yolqe 51 adjncent its upper extremity which is tirrunged inreceive a channel-shapedlug 53 integral .with arm 15 and extendingtherefrom in substantially the position occu' outwardly In this formpied by lugs 40 in the embodiment of the invention heretofore described,a pivot pin; 55 extending transversely throu h the arms ofthe yoke andthrough vertical y extending slots 56 in the sides of the lug serving-tosecure the parts together. Within the spfaoe formed by the sides of thelug is pcsitibned a cam 60, transversely pivoted on pin 55 and forcedconstantly against the upper surface of the bottom of lug 53 in thedirection of the arrow in Fi 3 by means of a'suitable coil spring'BQ wich may be disposed'in a recess 63 m the'sideof the cam, one end of thespring being attached to the side of the cum and theother end to pivotpin 55, which is squared adjacent its head and adapted to engage in a.correspondingly squared aperture 1n yoke 51 or otherwise arranicd toprevent it from axial rotation. m t e form of the invention previouslydescribed a l-m 15' is pivotedto flanges of shoe 6' bymeans of apgvotpin 17', and the underside of the arm etw'een the in at'id the extremityof lug 53 is hollow out to provide space for the revolution of the cam.A. small spring, or springs .65- may be suitably attached adjacent theextremities of the shoes to lightly hold the shoes together and, keepthem constantly in contact w th the drum.

It will be evident that this form of the invention as regards. itsfunction of permitting substantially free rotation of the shoes in onedirection about the drum and of rematerially deflected. the free end ofarm 15 will be moved upwardly about pivot 17", thus carrying flange 50down into contact with lip 34', and con fining s ring 30 to render someinoperative, after W ich, further movement of arm 15 will tend to forcethe shoes apart through the engagement of flange 50 with lip 84', whichtendency is resisted, however, by tension spring-65 which keeps theshoes-constantly in light contact with the drum. Such further movementor the arm. therefore, instead of forc ng the shoes apart results nmoving lug b3sdownwerdly with respect to yoke 51, pormittingcam '60 torotate e sli ht distance toifill up the gap thus caused etweenthelug'und the'cam, thus automati cally compensating for any weer oitheshoe linings, and constantly max taming the proper operative relationbetween t e severul parts of the invention.

While I have herein illustrated end described certain embodimentsof Ininven tion with considerable particularity and to said shoe, a springadapted to have shown them as, and described their operation when,attached to a vehicle, I do not thereby intend to specifically limit myself thereto or to the use of the invention in connection with avehicle, as various changes and modifications may be made in the detailsof construction and arrangement of the various parts and the inventionmay be employed as desired, without departing from the spirit and scopeof the invention as described in the appended claims.

Having thus described my invention, what I claim and desire to protectby Letters Patent of the United States is:

1. Mechanism having relatively movable members which when relativelymoved in one direction bring into play a continuouslystressed spring tocause frictional resistance to such movement and which when relativelymoved in the opposite direction permit sal" spring to act to renderitself inoperative to cause frictional resistance to such movementregardless of the extent of such movement.

2. A recoil check comprising a drum, shoes adapted to contact with saiddrum and relatively movable with respect thereto, a member, directlvconnected to one of said shoes, and movable with respect to said shoes,a spring adapted to force said shoes against said drum, and meansoperative to confine said. spring when said member is in one position,and to release said spring when the member is in another position.

3. A recoil check com rising a drum, shoes relatively movable withrespect to each other andwith respect to said drum, a member pivoted toone of said shoes, a spring adapted to force said shoes against saidrnm, means to confine said sprin when said member is in one position anto re lease said spring to force said shoes against said drnm, as saidmember is rotated about; said pivot to assume a different position.

4. A recoil check comprising a drum, a pair of shoes relatively movableand mow able with respect to said drum, amember pivoted to one of saidshoes, means to limit the movement of said member with respect forcesaid shoes against said dram, means operative to confine said springdnrin t, relative movement of said shoes and said drum in one direction,and means actuated by the movement of said member, with respect to theshoe to which it is pivoted, operative to release said spring duringrelative movement of said shoes and said drum in the other direction toforce said shoes against said drum.

5. The combination of a plurality of relatively movable members, s ringmeans to force said "members toget er, means to give any desired amountof energy to said spring, means, operated by'qn d spring, to

confine the action of said spring during relative movements of saidmembers in one direction and means to nullify said confinint, means andthereby permit said spring to form said moinlicrs together when they aremoved in the opposite direction.

6. The combination of a plurality of relativcly movable members, springmeans to force said members togetl'icr, means to give any desired amountof energy to said spring, means, operated by said spring, to confine theaction of salt spring during relative movt-nncnt of said members in onedirection, means to nullify said confining means and thereby permit saidspring to force said members together when they an moved in the oppositedirection, and means automatically operating to compensate for wearbetween said relatively movable members.

7. The combination with relatively movable members ot" a springoperative to force said members together, means, operable by saidspring. to positively rontine said. spring daring relative movement ofsaid members in one direction means to release said spring to force saidmembers together when relatively moved in the opposite dirertion andmeans operative to automatically com 'sen sate for wear between saidmembers where by said spring is made effective in prodncc asubstantially J said members together during and throughout theirrelative movement, irrespective of said wear.

8. In combination. relatively movablechn 10G tacting friction members,means opersti ve to force said members together, spring-operated meansto render said first-mentioned means inoperative to force said membersto gether during: their relative movement in one 105 direction and meansto automatically compensate for wear between said members and thusmaintain any given force exerted by the firsbmeniioned means.

9. The combination of members having 110 adjacent frictional surfaces, aspring acting as a means for transmitting power to force said surfacestogether during their relative movenn-nt in one direction and meansactinntml by said spring to render said spring- 115 inoperative totransmit power to force sai members together during their total possiblerelative movement m the opposite dircction regardless of the speed ofsuch movement.

10. The combination of relatively movable memhcrs and spring meansoperative to cause any desiredamount of constant resist-v ance to andthroughout relativemovement of said members in one direction and means,126 initiated by said spring means, to render, said spring meansinoperative to cause said resistance. 11: The combination of relativelymow able members, a stressed spring adapted 170 1 89 constant pressurein forcing mmwcti mug and clampi 11;; means, an arr-:11 the censtent.tends-hey (if id spring is in mnvn said ehmiping means inin dampingpositi n,

Tin mmbii :1 his mm M i i #1,:3 fiwiy is; ifi'jiii hiliii In 1% i veils,TU 2%! press said ya -seaming? (apex-M said we Wlil mid :wmatm vetienrsf mi isms pesi tn (Wik other in cempenssii Ii said members. The (fiihiiil-ilwp m ieisliwiaiy mow able fair 7 .l a centimmuslyst FSSGd S T inlures said members te ="':ii1\'(! in fame said msmi fmiimstressed, it Ofwe relative in; device) for memes mm einent of said mm mid spring.

21', The (lolnblllflilia'fil able friction in stressed spring amp barstegethei and npemii members togethe when !i lira: stressed, and means,lPdupsiuimli m the relative movement of said members, ta further stresssaid spring, and means in aubenmtically maintain, regardless of mresulting from relative movement of u z ieLi-m members, the powerexerted In iti i g to force said members tegethm.

In a metion vi) 15s: cmniimation of relatively movable fz'iiv-u,Il-.!sll*f"i-', a coni:inmusly-stressmi Sp! to force said members webin migugrement, and an element, mevsbie wiil reaped to one of saidmembers, which, when moved relatively thereto in one dire/(mien, fumessaid spring to force said members min minding engagemerit.

529. In a motiun i'lli jia, the combinationof relatively movable in mumemiwrs, a continuously-stresseci spring whrpted to force said membersinw binding e' ngagement, an element, movable Wiii! n sp to ens of saidmembers, which, when mews} relatively then-eta in one direction, forcessaid spring to fiorce said members ism finding engage mania, and meanst0 auwnmileslly maintain, regardless of wear resulting from relativemovement of said fi-iciun members, the force exerted by said spring fora given movement of said element reiat-ive to one of said members.

In witness wliereef I have hereunto set my hand this 27th day (if July,1916.

JOHN WI WATSON.

ITQGHP 1:1 farce said

